The Management Consultancy practice commenced in August 1974 under the name, 'Nihal Sri Ameresekere Management Consultants', which was later incorporated in May 1978 as 'Comindtax Management Service Ltd.', and later in December 2007 it was re-named as 'Consultants 21 Ltd'. Management Consultancy services were afforded to a wide range of local and foreign clientele, including the State Sector, becoming a Member, International Consortium on Governmental Financial Management, US. The Management Consultants services, inter-alia, included the re-structuring and re-organization of businesses, promotion and development of new projects in various sectors, and the provision of strategic advice to top management. Later, this practice developed into a pioneering litigation support service, providing assistance to Clients and Lawyers, vis-à-vis, complex commercial disputes and litigations, becoming an Associated Member, American Bar Association. In the 1990s successfully pioneered the first derivative action law in Sri Lanka (Ameresekere v Mitsui & Co. Ltd., and Others [1992] LRC (Comm)), and ventured into the realm of public interest litigations, including challenges to legislations being enacted, together with the publication of a series of articles in the media on fraud and corruption exposures, with representations being made in the public interest, including to global institutions, becoming a Member, Certified Fraud Examiners, US . From mid-2000 committedly commenced promoting the implementation of the UN Convention Against Corruption, having become a Member, International Association of Anti-Corruption Authorities, Beijing. Nihal Sri Ameresekere has been a reputed Lecturer on Management Studies and a Public Speaker on the combat of fraud and corruption at international fora, including conducting Talk Shows on national Television. In mid-2000 also actively participated in the formulation of the new Companies Act No. 7 of 2007 of Sri Lanka. During the years 2010 to 2013 Nihal Sri Ameresekere authored a series of 13 Books on researched case studies on fraud and corruption, economic crime, public finance, governance and the rule of law, released through Consultants 21 Books Ltd., and published by AuthorHouse US, a Penguin Group Company, marketed globally, and used in several Libraries of specialized institutions engaged in studies in combatting fraud and corruption.